Glue gun



FIG. 1 is a front, right, top perspective view of the glue gun;

FIG. 2 is a front elevation view of the glue gun;

FIG. 3 is a rear elevation view of the glue gun;

FIG. 4 is a left side elevation view of the glue gun, the right side elevation view of the glue gun being a mirror image of the left side elevation view;

FIG. 5 is a top plan view of the glue gun; and,

FIG. 6 is a bottom plan view of the glue gun.

The shade lines in the figures show contour and not surface ornamentation. The broken lines in the figures show portions of the glue gun that form no part of the presently claimed design. 

CLAIM The ornamental design for a glue gun, as shown and described. 